Hand-tool



F. M. RAMSDELL.

HAND TOOL.

APPLICATION FILED APR.15, 1920.

1,382,932. PatemedJ-une 28, 1921.

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APPLICATION FILED APR. 15, 1920.

1,382Q932. Patented June 28, 1921.

2 SHEETS-SHEET 2.

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UNITED STATES FREDERICK M. RAMSDELL, 0F WORCESTER, MASSACHUSETTS.

' HAND-TOOL.

Specification of Letters Patent.

Patented June 28, 1921.

Application filed April 15, 1920. Serial No. 374,082.

To all whom it may concern:

Be it known that I, FREDERICK M. RAMs- DELL, a citizen of the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Hand-Tool, of which the following is a specification.

This invention relates to a device for use in small shops, more especially repair shops, and in connection with home repair kits and job shops, for use in performing certain necessary and very common machine shop operations without the use of the ordinary machine shop equipment. The chief objects are to provide a simple and convenient tool holder for use in holding a tool stationary if the operator has a lathe or other machine for rotating the work, or if he does not, for rotating the tool while the work is held in a vise; to provide an improved support for a tool for cutting a taper on the end of a piece of work, suitable for use with the above mentioned tool holding device; also to provide an improved guide for the work cooperating with the tool holder in such a way as to properly center-it with respect to the work; and to provide an improved form of nurling attachment to be used in connection with the same equipment. The invention also involves improvements in various details of the above mentioned features.

Reference is to be had to the accompanying drawings in which Figure 1 is a planof a tool holder and a taper cutting tool mounted thereon constructed in accordance with this invention;

' Fig. 2 is an end v ew of the same;

Fig. 3 is a side View of the tool and its immediate support;

Fig. 4 is a central sectional view of the same on the line 44 of Fig. 1;

Fig. 5 is a plan of the tool holder proper;

Fig. 6 is a central sectional view of the same; i I Fig. 7 is a bottom plan view thereof;

Fig. 8 is a plan of the centering disk;

Fig. 9 is a side view showing the work and the manner in which it is centered by said disk and illustrating a die in position for cutting a thread thereon; i Fig. 10 is a plan of the die;

. 11 is a plan of a nurling attachment constructed in accordance with tion; Fig. 12 is an end view of the same showing how the work is supported in a vise;

Fig. 1?) 1s a view of the opposite end of the nurling attachment detached from the tool holder;

14 is a side view of the same;

Fig. is a bottom plan of the plate for supporting the nurling tool arms;

Fig. 16 is a sectional view on the 16- 16of Fig. 15,and

Fig 17 is a view of the work performed on this device showing the guiding means thereon in central section.

As stated above'this invention is designed for use in small job shops and other places where machinery is not available for performing certain common metal working operations. It can be used for cutting threads, cutting tapers, nurling, and various other operations, but these three uses are the ones illustrated in the drawings. It will this invenline be understood without further comment that either the work may rotate or the tool, the other being stationary. If a lathe is at hand the work is applied to it so as to rotate and the work holder is held against rotation and fed along the work if necessary by hand, but I have illustrated the invention as being used where no such rotating device is at hand and I have shown thework in the form of a screw A as being held in avise B, so that it will be necessary therefore in thatcase to rotate the tool, thisbeing done by hand as in the case of the ordinary cutting of' a thread with a die and hand die plate.

In all the forms illustrated a tool holder is shown which involvestwo halves 10 and 11. These two halves or clamping members are provided with perforations located at equal distances from the center and on opposite sides of the center and parallel with each other, one of the perforations in each ing the tool holdermit of their being used in this way and they project in opposite directions butat a distanceapart from the opposite sides of the tool holder itself as shown more clearly in Fig. 1. These handles are used to clamp the device in position so as tohold the tocl that is to be used and also to hold a centering and guiding disk 14 in a cylindrical recess 15 at one end of the tool holder. The other end of the tool holder also has a similar recess 16 which is adapted for receiving a projection or element of a similar shape con .nected with. the metal working tool itself. In its simplest application this will receive a die 17 for cutting a thread; this die having a Hat cylindrical shape. This device witha tap applied thereto can be used as a tap wrench.

In the use of the device for cutting a thread therefore the tool holder is clamped up on the two disks 14 and 17 located respectively in the recesses 15 and 16 and they occupy the relative positions shown in Fig.

9. Being clamped normally in position they partake of all the movements of the tool holder and while the central passage in the disk 14 fits the work A the die will cut a thread thereon by the ordinary act of turn The disk 14 and die 17 are'spaced apart and both rotate about the work which they fit. This forms a centering and guiding device for insuring the] accuracy of the work, something that is not present in thc ordinarythread cutting die.

Similar functions and operations take pl'acein the use of this instrument no matter whatthe tool may be that is applied to it. Referring noW again to Figs. 1, 2, 3 and 4 the die 17 is replaced by a projection 20 of the samesize and shape asthe outline of the die and extending from a work support 21. This projection holds the work support when the handles 12 are clamped up in position and the'disk 14 also clamped in place in the same way as shown in connection with Fig.9. This work support in addition, however, is provided with another recess 22 which holds a second disk 24 like the disk 14, including the central perforation. These two disks therefore serve to center'and guide the work'with respect to the tool holder in a'manner similar to that indicated in Fig. 9; The disk 24 is held in position by a screwf23 or in any other desired way.

on the tool holder 21 is a surface 25, preferably. inclined. v is an integral projection 26 extendingup above it and provided with a pin 27 in its edge and with an adjusting screw 28 extend ing through it. The pin 27 and screw 28 are spaced'materi'aIly apartfl A,

' On-the opposite side is a :similar projection 29 having two adjusting and holding 9 screws 30. The cutting tool 31 is intended to be held between the four points repre- Back of this surface there sented by the parts 27, 28, 30 and 30. These order to do this the tool is properly. adjusted as to angle and location, pre'lerably'with one edge substantially radial with respect to the work. The tool support 21 is clamped in the tool holder 10-11 as has been described above, the disk 24 first being secured in position on the work support and the disk 14 on the tooljholder'. This structure involving the tool, tool support, and

if desired so as to permit of reversing the cutting tool when it is worn or, as shown, it may be shaped so as to permit'the cutting ofl? of the end of the work at a right angle. It is necessary in the form shown to turn the tool around and turn it over 90 degrees in order to use this particular tool for that purpose, It will beunderstood that this tool 31 is merely illustrative and that tools of any desired shape and having all kinds of edges can be-used with this invention to produce the desired results.

0n the second sheet of drawings I have shown the same tool holder in all details and illustrated it as used for operating a nurling attachment. In this case the nurling attachment comprises a plate'41 having a circular recess 42 therein for receiving thedetachable disk 24 with aperforation therethrough. This is inserted in the recess and need not be clamped therein in view of the construction; The plate has a cylindrical projection 40 concentric with the recess 42 and adapted to be received in the recess 16 of the tool holder for the same purpose as the projection 20-above described: The disk 14 is also used, as before. This permits oftherotation of the pl ate 41 about the work as a center. a

The plate 41 isprovided with two perforations in which are placed pivot sQreWS145 on. which are pivoted arms 46 each provided with a hurling wheel 47" rotatably mounted thereon. .Qne arm has a swinging pivot screw48 pivoted thereto and project ing through a perforation in 'theoth'er arm. It has an adjusting nut 49 on the end? for forcing the two nurling rolls toward each other as much as may be desired. These parts being applied to the tool holder and centered on the work by means of the disks.

work will result in providing a knurled surface at a? on the work.

I have not illustrated all the tools that can be used in connection with this device as it willbe understood that within the scope of this invention many others can be provided. It will be seenthat this simple arrangement furnishes an accurate and mechanical construction for use under the conditions above mentioned for the purpose of performing any of the simple metal working operations that do not require too deep a cut. The work and tool holder are accurately centered and guided with respect to each other on account of the distance apart of the guiding disks which I have described. This enables many individuals to make repairs and also even make screws and other small articles at their homes or in small repair shops without the necessit of installing any expensive equipment. s a

matter of fact even if they do have the equipment this device is more easily set up than would be the case with certain kinds of machinery and will be found useful where only one or a small number of parts are to be made even in shops that do have machinery suitable for manufacturing.

Although I have illustrated and described only three uses for this device and shown only a single construction of the tool holder proper I am aware of the fact that it can be applied to other uses and that modifications can be made in the parts without departing from the scope of the invention as expressed in the claims, and I do not wish to be restricted in these respects except as specified therein.

What I claim is 1. As an article of manufacture, a hand tool comprising a pair of complementary clamping members, a pair of handles each having a screw thread, said members each having two parallel openings located on opposite sides of the center. one of each pair being screw -threaded, for receiving the screw threaded portions of said handles so that said members are clamped together thereby, said handles extending in opposite directions from opposite sides of said members, said members having concave jaws at one end adapted to receive and clamp a cylindrical holding surface of a metal working tool, a similar pair of jaws at the other end, and a circular disk adapted to be held in the last named jaws and having a central passage for guiding and centering the work.

2. As an article of manufacture, a hand tool comprising a complementary pair of members, each having a clamping jaw on each end, the two jaws at the same end of the tool being arcuate, concentric, and of the same size, a centrally perforated circular guide disk located in one pair of jaws, a circular projection located in the other,-and a pair of spaced oppositely projecting handles for forcing said members together and clamping the jaws against the disk and projection, a second centrally perforated guide disk carried centrally by said projection,

said perforation through said disks constituting means for centering and guiding the work, and means connected wlth sald proectionfor carrying a metal working tool.

3.. The combination with a hand tool comprising a pair of complementary members, a pair of handles located on opposite sides of the center for clamping said members together, sald members having concave aws at one end and a similar pair of jaws at the other end, of a circular disk adapted to be held in the last named jaws and having a central passage for guiding and centering the work, and a metal working tool having a centrally perforated central projection fitting in the first named jaws and adapted to be clamped thereby.

4:. The combination of a clamping device having a central recess in each end, said recesses being spaced from each other longitudinally, of a guide disk clamped in one of said recesses and having a perforation at the center for fitting the work on which it is to be used and guiding it, a centrally perfoated cylindrical projection adapted to fit in the other of said recesses and provided with a guide centrally located therein for fitting the surface of the work, a tool connected with said projection for operation on the work, and handles projecting from said clamping device for manipulating it and the tool and clamping said disk and projection in said recesses.

5. The combination of a clamping device having a central recess in each end, said recesses being spaced from each other longitudinally, and a guide disk clamped in one of said recesses and having a perforation at the center for fitting the work on which it is to be used and guiding it, of a tool support having a centrally perforated cylindrical projection adapted to fit in the other of said recesses, a second guide disk centrally secured thereto for fitting the surface of the work, a tool mounted on said support for operation on the work, said tool support having a surface on which the tool is adapted to be mounted and provided with adjusting means at the side thereof for adjusting the position of the tool therein and clamping it thereto.

6. The combination of a clamping device having a cylindrical recess in each end, a guide disk clamped in one of said recesses and having a perforation at the center, a

metal Working tool support having a centrally perforated adapted to fit in the other of said recesses and provided with a second guide disk centrally secured thereto, and having a tool mounted thereon for operation on the Work,

said guide disk being spaced apart for fitting the work on which theyare to be used and guiding it, and a cutter mounted on said tool second guide centrally secured thereto for fitting thesurface of the Work, handles projecting from said device for manipulating it and "clamping the first named guide and cylindrical projection projection in position, and a taper cutter mounted on said support at an incllnatlon and having an inclined cutting edge.

8. The combinatlon of a clamping device, a guide dlsk clamped therein and havlng a perforation at the center for fitting the Work on Which it is to be used, a metal Working tool support clamped by the other end of said device, a guide centrally secured thereto'for fitting the surface of the Work, said clamping member having handles projecting therefrom for manipulating it, and a cutter ad- 'justably and reversibly mounted on said sup- 'port and having a cutting edge for determining the shape to be cut on the Work.

In testimony whereof I have hereunto *aifixed my signature.

i FREDERICK M; 'RAM'SDELL; 

